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| author | Al Viro <viro@zeniv.linux.org.uk> | 2015-05-07 20:32:22 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-05-11 08:13:13 -0400 |
| commit | 6548fae2eca6b66c7257af6663fdbdf5a50745fd (patch) | |
| tree | 9bd27e6603841fa48feca5a053b8c8b1ecd5129c /fs/namei.c | |
| parent | ecc087ff14352aed52b8e775b4511e7f9cfc64ec (diff) | |
| download | lwn-6548fae2eca6b66c7257af6663fdbdf5a50745fd.tar.gz lwn-6548fae2eca6b66c7257af6663fdbdf5a50745fd.zip | |
namei: make put_link() RCU-safe
very simple - just make path_put() conditional on !RCU.
Note that right now it doesn't get called in RCU mode -
we leave it before getting anything into stack.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/namei.c b/fs/namei.c index 43034046a0e1..998c3c2c9488 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -750,7 +750,8 @@ static inline void put_link(struct nameidata *nd) struct inode *inode = last->inode; if (last->cookie && inode->i_op->put_link) inode->i_op->put_link(inode, last->cookie); - path_put(&last->link); + if (!(nd->flags & LOOKUP_RCU)) + path_put(&last->link); } int sysctl_protected_symlinks __read_mostly = 0; |